package demo2;

public class KeyBoard implements USB {

    @Override
    public void openDevice() {
        System.out.println("打开键盘");
    }

    @Override
    public void closeDevice() {
        System.out.println("关闭键盘");
    }
    public void input() {
        System.out.println("敲击键盘");
    }
}
